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Electroluminescent material, method for manufacturing same, and light emitting device

a technology of electroluminescent materials and manufacturing methods, applied in the field of display, to achieve the effect of long li

Active Publication Date: 2022-05-03
WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes a new material for electroluminescence that has a long lifespan and emits red light. The material uses a strong electron-withdrawing group to improve its electron-withdrawing property, which enhances the electron transfer between different parts of the molecule. This improves the intermolecular charge transfer and reduces the energy levels of the molecule, resulting in a long lifespan and red light emission. A method for manufacturing this material and a light emitting device are also provided.

Problems solved by technology

In prior art, organic light emitting diodes (OLEDs) are self-luminous, where electroluminescent material is a material that mainly dominates emitted light; however, luminous efficiency of the existing electroluminescent material is poor, which often leads to failure of an organic light emitting diode, therefore, it is necessary to provide an electroluminescent material, a method for manufacturing the electroluminescent material, and a light emitting device with a long life span and red-emitting.

Method used

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  • Electroluminescent material, method for manufacturing same, and light emitting device
  • Electroluminescent material, method for manufacturing same, and light emitting device
  • Electroluminescent material, method for manufacturing same, and light emitting device

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Embodiment Construction

[0054]The present application provides an electroluminescent material. A structural formula of the electroluminescent material is

[0055]

[0056]A structural formula of R1 group comprises one of

[0057]

[0058]A structural formula of R2 group comprises one of

[0059]

[0060]In some embodiments, the R1 group and the R2 group can be the same. In other embodiments, the R1 group and the R2 can be different.

[0061]The present application also provides a method for manufacturing the electroluminescent material. The method for manufacturing the electroluminescent material includes:

[0062]A, providing a first reactant and a second reactant, and reacting the first reactant and the second reactant to generate a first intermediate product, wherein a structural formula of the first reactant is

[0063]

a structural formula of the second reactant is

[0064]

and a structural formula of the first intermediate product is

[0065]

[0066]A reaction equation of reacting the first reactant and the second reactant to generate t...

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Abstract

The present application provides an electroluminescent material, a method for manufacturing an electroluminescent material, and a light emitting device, by employing the strong electron-withdrawing group such as cyano, pyridine, pyrimidine, or s-triazine to enhance the electron-withdrawing property of the fluorenone receptor unit, a captodative electron effect between the electron donor unit and the electron acceptor unit in the molecule is enhanced, so that the intermolecular charge transfer property is enhanced while the red light shifts, thereby further reducing the energy level difference between the single-line energy level and the triplet energy level of the target molecule, to realize a long life span, red light emitted electroluminescent material, a method for manufacturing the electroluminescent material and a light emitting device.

Description

RELATED APPLICATIONS[0001]This application is a National Phase of PCT Patent Application No. PCT / CN2019 / 106408 having International filing date of Sep. 18, 2019, which claims the benefit of priority of Chinese Patent Application No. 201910239980.3 filed on Mar. 27, 2019. The contents of the above applications are all incorporated by reference as if fully set forth herein in their entirety.FIELD AND BACKGROUND OF THE INVENTION[0002]The present application relates to a display field, and particularly to an electroluminescent material, a method for manufacturing the electroluminescent material, and a light emitting device.[0003]In prior art, organic light emitting diodes (OLEDs) are self-luminous, where electroluminescent material is a material that mainly dominates emitted light; however, luminous efficiency of the existing electroluminescent material is poor, which often leads to failure of an organic light emitting diode, therefore, it is necessary to provide an electroluminescent m...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): C07D219/14H01L51/00C07D401/14C09K11/06H01L51/50H10K99/00
CPCH01L51/0072C07D219/14C07D401/14C09K11/06H01L51/0058H01L51/0067C09K2211/1007C09K2211/1011C09K2211/1018H01L51/5012H01L51/5056H01L51/5072C07D219/02C09K2211/1029C09K2211/1044H10K85/615H10K85/654H10K85/6572H10K50/00H10K50/11H10K85/626H10K50/15H10K50/16
Inventor WU, KAILONGZHANG, QU
Owner WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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